0781-3503 - Victor VTS250 Series Medium Duty Two-Stage Oxygen Regulator, 2-15 PSIG

Precision Control with Victor VTS250 Series

The Victor 0781-3503 VTS250A-540 Oxygen Medium Duty Two Stage Regulator is engineered for applications demanding unwavering pressure stability. In scenarios where the inlet pressure from the gas cylinder decreases over time as the gas is consumed, a single-stage regulator typically allows the delivery pressure to rise, requiring constant manual correction. This VTS 250 Series regulator utilizes a sophisticated two-stage mechanism that automatically compensates for these fluctuations, ensuring that the outlet pressure remains constant at the set point throughout the life of the cylinder. This feature is critical for laboratory testing, precise flame cutting, and other technical applications where flow consistency directly impacts the quality of the work or data.

Constructed with a die-forged brass body and a brass spring housing cap, this unit is built to withstand the rigors of industrial environments while maintaining the sensitivity required for fine adjustments. The internal architecture features a stem-type seat mechanism that aids in positive sealing, reducing the risk of leaks. The regulator is equipped with a 1.3-inch to 1.75-inch fabric-reinforced neoprene diaphragm, which provides a responsive and durable interface for pressure regulation. The flow coefficient (Cv) of 0.082 indicates its suitability for medium-duty flow requirements, making it a versatile component for various gas delivery setups.

Safety and longevity are paramount in the design of the VTS250A-540. It includes an electroless nickel-plated bronze sintered inlet filter that traps particulate matter, protecting the internal seating surfaces from damage. Additionally, an external self-reseating relief valve is integrated into the design to manage over-pressurization events, although it is not intended to protect downstream equipment. The regulator connects via a standard CGA 540 inlet and offers a 9/16"-18 RH(M) outlet, compatible with standard oxygen hoses. The 2-inch steel gauges provide clear readings for both cylinder contents (up to 4000 PSIG range) and delivery pressure (0-30 PSIG range), ensuring operators have immediate visual confirmation of system status.